JEE Main 2023 January 25, Shift 2 Question Paper with Solutions

All 90 questions from the JEE Main 2023 (January 25, Shift 2) shift — Physics (30), Chemistry (30) and Mathematics (30) — each with the correct answer (answer key) and a step-by-step solution. Read it free online, or attempt the full paper as a timed mock test.

Physics PYQs 2023 Chemistry PYQs 2023 Mathematics PYQs 2023

Physics30 questions

Q1Single correctGravitation

Every planet revolves around the sun in an elliptical orbit:
A. The force acting on a planet is inversely proportional to square of distance from sun.
B. Force acting on planet is inversely proportional to product of the masses of the planet and the sun.
C. The Centripetal force acting on the planet is directed away from the sun.
D. The square of time period of revolution of planet around sun is directly proportional to cube of semi-major axis of elliptical orbit.
Choose the correct answer from the options given below:

(A)

C and D only

(B)

B and C only

(C)

A and C only

(D)

A and D only

Q2Single correctThermodynamics

Choose the correct answer from the options given below:

List I	List II
A.. Isothermal Process	I.. Work done by the gas decreases internal energy
B.. Adiabatic Process	II.. No change in internal energy
C.. Isochoric Process	III.. The heat absorbed goes partly to increase internal energy and partly to do work
D.. Isobaric Process	IV.. No work is done on or by the gas

(A)

A-I, B-II, C-III, D-IV

(B)

A-I, B-II, C-IV, D-III

(C)

A-II, B-I, C-IV, D-III

(D)

A-II, B-I, C-III, D-IV

Q3Single correctElectrostatics

A point charge of

10 μ C

is placed at the origin. At what location on the X-axis should a point charge of

40 μ C

be placed so that the net electric field is zero at

x = 2

cm on the X-axis?

(A)

x = 8

(B)

x = 6

(C)

x = - 4

(D)

x = 4

Q4Single correctThermal Properties of Matter

The graph between two temperature scales P and Q is shown in the figure. Q is shown in the figure. Between upper fixed point and lower fixed point there are 150 equal divisions of scale P and 100 divisions on scale Q. The relationship for conversion between the two scales is given by

Graph of Temperature (deg P) vs Temperature (deg Q): a straight line, with delta_tP=150 deg (vertical) and delta_tQ=100 deg (horizontal) marked.

(A)

\frac{t _{P}}{180} = \frac{t _{Q} - 40}{100}

(B)

\frac{t _{P}}{100} = \frac{t _{Q} - 30}{150}

(C)

\frac{t _{P}}{100} = \frac{t _{Q} - 180}{150}

(D)

\frac{t _{Q}}{150} = \frac{t _{P} - 180}{100}

Q5Single correctDual Nature of Radiation and Matter

Given below are two statements:
Statement I: Stopping potential in photoelectric effect does not depend on the power of the light source.
Statement II: For a given metal, the maximum kinetic energy of the photoelectron depends on the wavelength of the incident light.
In the light of above statements, choose the most appropriate answer from the options given below:

(A)

Both Statement I and Statement II are correct

(B)

Statement I is correct but statement II is incorrect

(C)

Both Statement I and Statement II are incorrect

(D)

Statement I is incorrect but statement II is correct

Q6Single correctRay Optics

The light rays from an object have been reflected towards an observer from a standard flat mirror, the image observed by the observer are: -
A. Real
B. Erect
C. Smaller in size than object
D. Laterally inverted
Choose the most appropriate answer from the options given below:

(A)

B and D Only

(B)

A and D Only

(C)

A, C and D Only

(D)

B and C Only

Q7Single correctProjectile Motion

Two objects are projected with same velocity 'u' however at different angles

α

and

β

with the horizontal. If

α + β = 9 0^{\circ}

, the ratio of horizontal range of the first object to the 2nd object will be:

(A)

1 : 2

(B)

4 : 1

(C)

2 : 1

(D)

1 : 1

Q8Single correctAtmospheric Physics

Choose the correct answer from the options given below:

List I	List II
A.. Troposphere	I.. Approximate 65-75 km over Earth's surface
B.. E-Part of Stratosphere	II.. Approximate 300 km over Earth's surface
C.. $F_{2}$ -Part of Thermosphere	III.. Approximate 10 km over Earth's surface
D.. D-Part of Stratosphere	IV.. Approximate 100 km over Earth's surface

(A)

A-III, B-II, C-I, D-IV

(B)

A-I, B-II, C-IV, D-III

(C)

A-I, B-IV, C-III, D-II

(D)

A-III, B-IV, C-II, D-I

Q9Single correctAtoms

The energy levels of an atom is shown in figure.
Which one of these transitions will result in the emission of a photon of wavelength 124.1 nm?
Given (

h = 6.62 \times 1 0^{- 34}

Js)

Atomic energy-level diagram: four levels at 0.0, -2.2, -5.2, -10.0 eV with downward transitions A,B,C,D.

(A)

(B)

(C)

(D)

Q10Single correctMoving Charges and Magnetism

For a moving coil galvanometer, the deflection in the coil is 0.05 rad when a current of 10 mA is passed through it. If the torsional constant of suspension wire is

4.0 \times 1 0^{- 5}

N m

rad^{- 1}

, the magnetic field is 0.01 T and the number of turns in the coil is 200, the area of each turn (in

cm^{2}

) is :

(A)

1.0

(B)

0.5

(C)

2.0

(D)

1.5

Q11Single correctOscillations

A particle executes simple harmonic motion between

x = - A

and

x = + A

. If time taken by particle to go from

x = 0

\frac{A}{2}

is 2 s; then time taken by particle in going from

x = \frac{A}{2}

to A is

(A)

3

(B)

2

(C)

1.5

(D)

4

Q12Single correctElectromagnetic Induction

A wire of length 1 m moving with velocity 8 m/s at right angles to a magnetic field of 2 T. The magnitude of induced emf, between the ends of wire will be________.

(A)

20

(B)

16

(C)

8

(D)

12

Q13Single correctMotion in a Straight Line

The distance travelled by a particle is related to time t as

x = 4 t^{2}

. The velocity of the particle at

t = 5

s is.

(A)

8

s^{- 1}

(B)

20

s^{- 1}

(C)

40

s^{- 1}

(D)

25

s^{- 1}

Q14Single correctGravitation

A body of mass is taken from earth surface to the height h equal to twice the radius of earth

(R_{e})

, the increase in potential energy will be:
(

g =

acceleration due to gravity on the surface of Earth)

(A)

\frac{1}{3} mgR_{e}

(B)

3 mgR_{e}

(C)

\frac{2}{3} mgR_{e}

(D)

\frac{1}{2} mgR_{e}

Q15Single correctUnits and Measurements

Choose the correct answer from the options given below.

List I	List II
A.. Young's Modulus (Y)	I.. $[M L^{- 1} T^{- 1}]$
B.. Co-efficient of Viscosity ( $η$ )	II.. $[M L^{2} T^{- 1}]$
C.. Planck's Constant (h)	III.. $[M L^{- 1} T^{- 2}]$
D.. Work Function ( $ϕ$ )	IV.. $[M L^{2} T^{- 2}]$

(A)

A-III, B-II, C-I, D-IV

(B)

A-III, B-I, C-II, D-IV

(C)

A-IV, B-II, C-I, D-III

(D)

A-I, B-II, C-III, D-IV

Q16Single correctElectromagnetic Waves

Choose the correct answer from the options given below :

List I	List II
A.. Gauss's Law in Electrostatics	I.. $\oint E \cdot d l = - \frac{d ϕ _{B}}{d t}$
B.. Faraday's Law	II.. $\oint B \cdot d A = 0$
C.. Gauss's Law in Magnetism	III.. $\oint B \cdot d l = μ_{0} i_{c} + μ_{0} ε_{0} \frac{d ϕ _{E}}{d t}$
D.. Ampere-Maxwell Law	IV.. $\oint E \cdot d s = \frac{q}{ε _{0}}$

(A)

A-II, B-III, C-IV, D-I

(B)

A-IV, B-I, C-II, D-III

(C)

A-IV, B-III, C-II, D-I

(D)

A-I, B-III, C-IV, D-II

Q17Single correctKinetic Theory of Gases

According to law of equipartition of energy the molar specific heat of a diatomic gas at constant volume where the molecule has one additional vibrational mode is :

(A)

\frac{3}{2} R

(B)

\frac{7}{2} R

(C)

\frac{9}{2} R

(D)

\frac{5}{2} R

Q18Single correctLaws of Motion

Consider a block kept on an inclined plane (inclined at

4 5^{\circ}

) as shown in the figure. If the force required to just push it up the incline is 2 times the force required to just prevent it from sliding down, the coefficient of friction between the block and inclined plane

(μ)

is equal to

A hatched square block resting on a 45-degree inclined plane (right triangle with dashed horizontal base).

(A)

0.60

(B)

0.25

(C)

0.50

(D)

0.33

Q19Single correctSemiconductor Electronics

Statement I : When a Si sample is doped with Boron, it becomes P type and when doped by Arsenic it becomes N-type semiconductor such that P-type has excess holes and N-type has excess electrons.
Statement II : When such P-type and N-type semiconductors, are fused to make a junction, a current will automatically flow which can be detected with an externally connected ammeter.
In the light of above statements, choose the most\ appropriate answer from the options given below.

(A)

Both Statement I and statement II are correct

(B)

Statement I is correct but statement II is incorrect

(C)

Both Statement I and Statement II are incorrect

(D)

Statement I is incorrect but statement II is correct

Q20Single correctCurrent Electricity

The resistance of a wire is

5 Ω

. It's new resistance in ohm if stretched to 5 times of it's original length will be

(A)

25

(B)

5

(C)

125

(D)

625

Q21NumericalMagnetic Effects of Current and Magnetism

Two long parallel wires carrying currents 8 A and 15 A in opposite directions are placed at a distance of 7 cm from each other. A point P is at equidistant from both the wires such that the lines joining the point P to the wires are perpendicular to each other. The magnitude of magnetic field at P is _______

\times 1 0^{- 6}

(Given : 2 = 1.4)

Two parallel wires end-on: 15 A (left) and 8 A (right), 7 cm apart, with 7/sqrt2 cm slant distances to a point P at right angle.

Q22NumericalRotational Motion

If a solid sphere of mass 5 kg and a disc of mass 4 kg have the same radius. Then the ratio of moment of inertia of the disc about a tangent in its plane to the moment of inertia of the sphere about a tangent will be

\frac{x}{7}

. Then the value of x is _______

A solid sphere of mass m=5 kg rotating about a vertical axis tangent to its right edge.

Q23NumericalRay Optics and Optical Instruments

An object is placed on the principal axis of convex lens of focal length 10 cm as shown. A plane mirror is placed on the other side of lens at a distance of 20 cm. The image produced by the plane mirror is 5 cm inside the mirror. The distance of the object from the lens is _______ cm.

Optical axis with object O on the left, a convex lens L at centre, and a plane mirror M on the right, 20 cm from the lens.

Q24NumericalCurrent Electricity

Two cells are connected between points A and B as shown. Cell 1 has emf of 12 V and internal resistance of

3 Ω

. Cell 2 has emf of 6 V and internal resistance of

6 Ω

. An external resistor R of

4 Ω

is connected across A and B. The current flowing through R will be _______ A.

Two cells in parallel between A and B: Cell 1 (12 V, 3 ohm) and Cell 2 (6 V, 6 ohm).

Q25NumericalElectrostatic Potential and Capacitance

A capacitor has capacitance

5 μ F

when it's parallel plates are separated by air medium of thickness d. A slab of material of dielectric constant 1.5 having area equal to that of plates but thickness

\frac{d}{2}

is inserted between the plates. Capacitance of the capacitor in the presence of slab will be _______

μ F

Parallel-plate capacitor of separation d with a dielectric slab of thickness d/2 partially inserted.

Q26NumericalOscillations and Waves

A train blowing a whistle of frequency 320 Hz approaches an observer standing on the platform at a speed of 66 m/s. The frequency of the observer will be (given speed of sound

= 330 ms^{- 1}

) Hz.

Q27NumericalAtoms and Nuclei

A nucleus disintegrates into two smaller parts, which have their velocities in the ratio 3:2. The ratio of their nuclear sizes will be

(\frac{x}{3})^{\frac{1}{3}}

. The value of 'x' is _______

Q28NumericalLaws of Motion

A body of mass 1 kg collides head on elastically with a stationary body of mass 3 kg. After collision, the smaller body reverses its direction of motion and moves with a speed of 2 m/s. The initial speed of the smaller body before collision is _______ m

s^{- 1}

Q29NumericalAlternating Current

A series LCR circuit is connected to an AC source of 220 V, 50 Hz. The circuit contains a resistance

R = 80 Ω

, an inductor of inductive reactance

X_{L} = 70 Ω

, and a capacitor of capacitive reactance

X_{C} = 130 Ω

. The power factor of circuit is

\frac{X}{10}

. The value of X is :

Series LCR loop: R=80 ohm, X_L=70 ohm, X_C=130 ohm, with an AC source.

Q30NumericalMechanical Properties of Fluids

A spherical drop of liquid splits into 1000 identical spherical drops. If

u_{i}

is the surface energy of the original drop and

u_{f}

is the surface energy of the resulting drops, the (ignoring evaporation),

\frac{u _{f}}{u _{i}} = (\frac{10}{x})

. Then value of x is _______ :

Chemistry30 questions

Q31Single correctClassification of Elements and Periodicity in Properties

Which of the following represents the correct order of metallic character of the given elements?

(A)

Be < Si < K < Mg

(B)

K < Mg < Be < Si

(C)

Be < Si < Mg < K

(D)

Si < Be < Mg < K

Q32Single correctAmines

Choose the correct answer from the options given below.

LIST-I (Amines)	LIST-II ( $p K_{b}$ )
A.. Aniline	I.. 3.25
B.. Ethanamine	II.. 3.00
C.. N-Ethylethanamine	III.. 9.38
D.. N, N-Diethylethanamine	IV.. 3.29

(A)

A-III, B-II, C-I, D-IV

(B)

A-III, B-II, C-IV, D-I

(C)

A-I, B-IV, C-I, D-III

(D)

A-III, B-IV, C-I, D-I

Q33Single correctp-Block Elements

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : Carbon forms two important oxides – CO and C

O_{2}

. CO is neutral whereas C

O_{2}

is acidic in nature.
Reason R : C

O_{2}

can combine with water in a limited way to form carbonic acid, while CO is sparingly soluble in water.
In the light of the above statements, choose the most appropriate answer from the options given below.

(A)

Both A and R are correct and R is the correct explanation of A

(B)

A is not correct but R is correct

(C)

A is correct but R is not correct

(D)

Both A and R are correct but R is NOT the correct explanation of A

Q34Single correctChemical Bonding and Molecular Structure

Statement I : Dipole moment is a vector quantity and by convention it is depicted by a small arrow with tail on the negative centre and head pointing towards the positive centre.
Statement II : The crossed arrow of the dipole moment symbolized the direction of the shift of charges in the molecules.
In the light of the above statements, choose the most appropriate answer from the options given below.

(A)

Statement I is incorrect but Statement II is correct

(B)

Both Statement I and Statement II are correct

(C)

Both Statement I and Statement II are incorrect

(D)

Statement I is correct but Statement II is incorrect

Q35Single corrects-Block Elements

Which one among the following metals is the weakest reducing agent?

(A)

(B)

(C)

(D)

Q36Single correctAlcohols, Phenols and Ethers

Find out the major product from the following reaction.
(The reactant is cyclohexanol bearing a methyl substituent; reagent:

H_{2} S O_{4}

(Concentrated),

Δ

(A)

Methyl-cyclohexene, C=C on right edge, gem-dimethyl at bottom.

(B)

Tetrasubstituted cyclohexene: methyls on both alkene carbons + a methyl on adjacent sp3 carbon (Saytzeff major).

(C)

Methyl-cyclohexene, C=C on top-right edge, gem-dimethyl at bottom.

(D)

Methylenecyclohexane: exocyclic =CH2 with methyls.

Q37Single correctEnvironmental Chemistry

A. Ammonium salts produce haze in atmosphere.
B. Ozone gets produced when atmospheric oxygen reacts with chlorine radicals.
C. Polychlorinated biphenyls act as cleansing solvents.
D. 'Blue baby' syndrome occurs due to the presence of excess of sulphate ions in water.
Choose the correct answer from the options given below.

(A)

A and C only

(B)

A, B and C only

(C)

A and D only

(D)

B and C only

Q38Single correctGeneral Principles and Processes of Isolation / Qualitative Analysis

A chloride salt solution acidified with dil.HN

O_{3}

gives a curdy white precipitate, [A], on addition of AgN

O_{3}

. [A] on treatment with N

H_{4}

OH gives a clear solution, B. A and B are respectively

(A)

AgCl

[NH_{4}]_{2} [Ag(OH)_{2}]

(B)

H [AgCl_{2}]

[Ag(NH_{3})_{2}] Cl

(C)

AgCl

[Ag(NH_{3})_{2}] Cl

(D)

H [AgCl_{2}]

[NH_{4}]_{2} [Ag(OH)_{2}]

Q39Single correctPolymers

Choose the correct answer from the options given below.

LIST-I (Name of Polymer)	LIST-II (Uses)
A.. Glyptal	I.. Flexible pipes
B.. Neoprene	II.. Synthetic wool
C.. Acrilan	III.. Paints and Lacquers
D.. LDP	IV.. Gaskets

(A)

A-III, B-I, C-IV, D-II

(B)

A-III, B-IV, C-II, D-I

(C)

A-III, B-IV, C-I, D-II

(D)

A-III, B-II, C-IV, D-I

Q40Single correctOrganic Chemistry — Some Basic Principles

Choose the correct answer from the options given below.

LIST-I (Isomeric pairs)	LIST-II (Type of isomers)
A.. Propanamine and N-Methylethanamine	I.. Metamers
B.. Hexan-2-one and Hexan-3-one	II.. Positional isomers
C.. Ethanamide and Hydroxyethanimine	III.. Functional isomers
D.. o-nitrophenol and p-nitrophenol	IV.. Tautomers

(A)

A-III, B-I, C-IV, D-II

(B)

A-IV, B-II, C-III, D-II

(C)

A-I, B-III, C-IV, D-IV

(D)

A-III, B-IV, C-I, D-II

Q41Single correctRedox Reactions / d- and f-Block Elements

Potassium dichromate acts as a strong oxidizing agent in acidic solution. During this process, the oxidation state changes from

(A)

+ 2

+ 1

(B)

+ 6

+ 2

(C)

+ 3

+ 1

(D)

+ 6

+ 3

Q42Single correctPhenols / Chemistry in Everyday Life

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion A : Butylated hydroxy anisole when added to butter increases its shelf life.
Reason R : Butylated hydroxy anisole is more reactive towards oxygen than food.
In the light of the above statements, choose the most appropriate answer from the options given below

(A)

Both A and R are correct but R is NOT the correct explanation of A

(B)

A is not correct but R is correct

(C)

Both A and R are correct and R is the correct explanation of A

(D)

A is correct but R is not correct

Q43Single correctEquilibrium

When the hydrogen ion concentration [H

^{+}

] changes by a factor of 1000, the value of pH of the solution ___________

(A)

increases by 1000 units

(B)

decreases by 2 units

(C)

increases by 2 units

(D)

decreases by 3 units

Q44Single correctHaloalkanes and Haloarenes

The isomeric deuterated bromide with molecular formula

C_{4} H_{8}

DBr having two chiral carbon atoms is

(A)

2-Bromo-2-deuterobutane

(B)

2-Bromo-1-deutero-2-methylpropane

(C)

2-Bromo-3-deuterobutane

(D)

2-Bromo-1-deuterobutane

Q45Single correctCoordination Compounds

Choose the correct answer from the options given below.

LIST I (Coordination entity)	LIST II (Wavelength of light absorbed in nm)
A.. $[CoCl(NH_{3})_{5}]^{2 +}$	I.. 310
B.. $[Co(NH_{3})_{5}]^{3 +}$	II.. 475
C.. $[Co(CN)_{6}]^{3 -}$	III.. 535
D.. $[Cu(H_{2} O)_{4}]^{2 +}$	IV.. 600

(A)

A-III, B-I, C-II, D-IV

(B)

A-IV, B-I, C-III, D-II

(C)

A-II, B-III, C-IV, D-I

(D)

A-III, B-II, C-I, D-IV

Q46Single correctAldehydes, Ketones and Carboxylic Acids

'A' in the given reaction is

(A)

1,3-dioxolan-4-one: 5-membered ring, C2-tert-butyl, C4 carbonyl, C5 gem-dimethyl.

(B)

1,3-dioxolane ring with C4-OH (not carbonyl), C2-tert-butyl, C5 gem-dimethyl.

(C)

Open-chain ether: tert-butyl-C(OH) linked via O to gem-dimethyl-C-COOH.

(D)

tert-butyl 2-hydroxy-2-methylpropanoate (open-chain ester).

Q47Single corrects-Block Elements

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: The alkali metals and their salts impart characteristic colour to reducing flame.
Reason R: Alkali metals can be detected using flame tests.
In the light of the above statements, choose the most appropriate answer from the options given below.

(A)

Both A and R are correct and R is the correct explanation of A

(B)

Both A and R are correct but R is NOT the correct explanation of A

(C)

A is not correct but R is correct

(D)

A is correct but R is not correct

Q48Single correctHydrogen

Choose the correct answer from the options given below:

LIST I	LIST II
A.. Cobalt catalyst	I.. $(H_{2} + Cl_{2})$ production
B.. Syngas	II.. Water gas production
C.. Nickel catalyst	III.. Coal gasification
D.. Brine solution	IV.. Methanol production

(A)

A-IV, B-I, C-II, D-III

(B)

A-IV, B-III, C-I, D-II

(C)

A-II, B-III, C-IV, D-I

(D)

A-IV, B-III, C-II, D-I

Q49Single correctGeneral Principles and Processes of Isolation of Elements

Given below are two statements:
Statement I : In froth floatation method a rotating paddle agitates the mixture to drive air out of it.
Statement II : Iron pyrites are generally avoided for extraction of iron due to environmental reasons.
In the light of the above statements, choose the correct answer from the options given below:

(A)

Statement I is false but Statement II is true

(B)

Statement I is true but Statement II is false

(C)

Both Statement I and Statement II are false

(D)

Both Statement I and Statement II are true

Q50Single correctSolutions

What is the mass ratio of ethylene glycol

(C_{2} H_{6} O_{2},

molar mass = 62 g/mol) required for making 500 g of 0.25 molal aqueous solution and 250 mL of 0.25 molal aqueous solution?

(A)

2 : 1

(B)

1 : 2

(C)

1 : 1

(D)

3 : 1

Q51NumericalChemical Kinetics

A first order reaction has the rate constant,

k = 4.6 \times 1 0^{- 3} s^{- 1}

. The number of correct statement/s from the following is/are____________
Given:

lo g 3 = 0.48

A. Reaction completes in 1000 s.
B. The reaction has a half-life of 500 s.
C. The time required for 10% completion is 25 times the time required for 90% completion.
D. The degree of dissociation is equal to

(1 - e^{- k t})

E. The rate and the rate constant have the same unit.

Q52NumericalSurface Chemistry

The number of incorrect statement/s from the following is/are____________
A. Water vapours are absorbed by anhydrous calcium chloride.
B. There is a decrease in surface energy during adsorption.
C. As the adsorption proceeds,

Δ H

becomes more and more negative.
D. Adsorption is accompanied by decrease in entropy of the system.

Q53NumericalSome Basic Concepts of Chemistry

Number of hydrogen atoms per molecule of a hydrocarbon A having 85.8% carbon is __________.
(Given: Molar mass of A = 84 g mo

l^{- 1}

)

Q54NumericalAtomic Structure

The number of atomic orbitals having electron density along the axis is __________.

p_{x}, p_{y}, p_{z}, d_{x y}, d_{yz}, d_{z x}, d_{x^{2} - y^{2}} and d_{z^{2}}

Q55NumericalAlcohols, Phenols and Ethers; Aldehydes and Ketones

Number of compounds giving (i) red colouration with ceric ammonium nitrate and also (ii) positive iodoform test from the following is _____

Eight candidate organic structures (acetophenone, alcohols, aldehyde, ether, etc.) to be classified.

Q56NumericalSolutions

The number of pairs of the solutions having the same value of the osmotic pressure from the following is _________.
(Assume 100% ionization)
A. 0.500 M

C_{2} H_{5} OH

(aq) and 0.25 M KBr (aq)
B. 0.100 M

K_{4} [Fe(CN)_{6}]

(aq) and 0.100 M

FeSO_{4} (NH_{4})_{2} SO_{4}

(aq)
C. 0.05 M

K_{4} [Fe(CN)_{6}]

(aq) and 0.25 M NaCl (aq)
D. 0.15 M NaCl (aq) and 0.1 M

BaCl_{2}

(aq)
E. 0.02 M KCl.

MgCl_{2} .6 H_{2} O

(aq) and 0.05 M KCl (aq)

Q57NumericalThermodynamics

28.0 L of

CO_{2}

is produced on complete combustion of 16.8 L gaseous mixture of ethene and methane at

25^{\circ} C

and 1 atm. Heat evolved during the combustion process is ____________ kJ.
Given:

Δ H_{C} (CH_{4}) = - 900 kJ mol^{- 1}

Δ H_{C} (C_{2} H_{4}) = - 1400 kJ mol^{- 1}

Q58NumericalElectrochemistry

Pt (s) ∣ H_{2} (g) (1 bar) ∣ H^{+} (a q) (1 M) ∥ M^{3 +} (a q), M^{+} (a q) ∣ Pt (s)

The

E_{cell}

for the given cell is 0.1115 V at 298 K when

\frac{[ M ^{+} ( a q )]}{[ M ^{3 +} ( a q )]} = 1 0^{a}

The value of a is _________
Given:

E_{M^{3 +} / M^{+}}^{0} = 0.2 V

\frac{2.303 RT}{F} = 0.059 V

Q59NumericalCoordination Compounds

Total number of moles of AgCl precipitated on addition of excess of

AgNO_{3}

to one mole each of the following complexes

[Co(NH_{3})_{4} Cl_{2}] Cl

[Ni(H_{2} O)_{6}] Cl_{2}

[Pt(NH_{3})_{2} Cl_{2}]

and

[Pd(NH_{3})_{4}] Cl_{2}

is __________

Q60NumericalStates of Matter

Based on the given figure, the number of correct statement/s is/are _________
A. Surface tension is the outcome of equal attractive and repulsive forces acting on the liquid molecule in bulk.
B. Surface tension is due to uneven force acting on the molecules present on the surface.
C. The molecule in the bulk can never come to the liquid surface.
D. The molecules on the surface are responsible for vapour pressure if the system is a closed system.

A beaker of liquid showing a surface molecule with net inward force vs a balanced bulk molecule (surface tension).

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Physics30 questions

Chemistry30 questions

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